讳疾忌医

Explanation: Taboo: evasive; bogey: fear, fear. Hide illness, do not want treatment. Analogy to cover up their criticism fearing the shortcomings and mistakes. 　　Usage: -Linked; as subject, object, attribute; containing derogatory, metaphor does not admit 　　Source: Zhou Song, "sub-almanacs week off": "people today have had, not gratifying regulations, such as disease and seek medical treatment care, Ning Wu also destroy the body without." 　　Examples: A ~ person is unable to correct their mistake. Thesaurus:  make a cart behind closed doors, to cover up one's faults and refuse to listen to counsels, Whitewash, cover up one's errors by excuses, smarted up